Polyethylene glycol (PEG), also known as polyethylene oxide (PEO), is a polyether compound with the general formula H-(O-CH2-CH2)n-OH. PEG is a water-soluble polymer with a wide range of applications in medicine, industry, and biotechnology. It is used as a lubricant, a drug delivery vehicle, a surface modifier, and in various other applications.

聚乙二醇 (PEG)，也称为聚环氧乙烷 (PEO)，是一种通式为 H-(O-CH2-CH2)n-OH 的聚醚化合物。PEG 是一种水溶性聚合物，在医药、工业和生物技术领域具有广泛的应用。它用作润滑剂、药物输送载体、表面改性剂，以及各种其他应用。